Hot water system capable of recycling exhaust waste heat

Abstract

The utility model relates to a hot water system for recycling exhaust waste heat, which is characterized by comprising a daylighting roof, an air source heat pump and a heat storage water tank, the daylighting roof is arranged on a middle and large public building and a plant with a tall and large space or an atrium top, and the air source heat pump and the heat storage water tank are arranged on a roof on one side of the daylighting roof. An upper-layer water distributor and a lower-layer water distributor which are communicated with the heat storage water tank are arranged at the upper end and the lower end of the heat storage water tank respectively, the upper-layer water distributor is communicated with a circulating water inlet pipe, the lower-layer water distributor is communicated with a circulating water outlet pipe, and a heat exchange chamber is formed in the air source heat pump. The circulating water inlet pipe and the circulating water outlet pipe are connected with the two ends of a heat exchange pipeline arranged in the heat exchange chamber respectively, and the heat storage water tank is further communicated with a tap water supplementing point (6). By the adoption of the structure, investment of waste heat exhaust facilities on the roof can be omitted, and investment is saved to a certain extent.

Description

Technical Field

[0001] The utility model relates to the technical field of construction engineering, and particularly relates to a hot water system for recovering and utilizing exhaust waste heat. Background Art

[0002] In the field of construction engineering, the supply of air-conditioning and cold and hot water systems has become a basic requirement for buildings. While meeting the basic needs, reducing energy consumption and improving energy utilization efficiency are also the general trend. Among them, waste heat recovery and utilization is a very good technical means. Generally, large and medium-sized public buildings or factories are equipped with high spaces or atriums. In summer, a large amount of heat accumulates at the top due to heat radiation and the upward floating of hot air inside the building, and the energy consumption of the air-conditioning system is very large. Conventionally, mechanical exhaust is used to take the heat out of the room, which will cause great energy waste. Therefore, it is particularly important to design a hot water system for recovering and utilizing exhaust waste heat to solve this problem. Summary of the Invention

[0003] The utility model designs a hot water system for recovering and utilizing exhaust waste heat to solve the above problems, recovers and utilizes the useless building waste heat, prepares domestic hot water, creates secondary benefits and improves economic benefits.

[0004] To solve the above technical problems, the utility model provides a hot water system for recovering and utilizing exhaust waste heat, which is characterized in that: it includes a daylighting roof, an air source heat pump and a hot water storage tank arranged on the roof on one side of the daylighting roof. The upper and lower ends of the hot water storage tank are respectively provided with an upper layer water distributor and a lower layer water distributor connected to it. The upper layer water distributor is connected to a circulating water inlet pipe, and the lower layer water distributor is connected to a circulating water outlet pipe. A heat exchange chamber is arranged inside the air source heat pump. The circulating water inlet pipe and the circulating water outlet pipe are respectively connected to both ends of a heat exchange pipe arranged inside the heat exchange chamber. A circulating water pump and a second switching water valve are installed on the circulating water outlet pipe, and a first switching water valve is installed on the circulating water inlet pipe. On the side of the daylighting roof facing the air source heat pump, there are two connectors connected to a circulating air inlet pipe and a circulating air outlet pipe. The two connectors are connected to the heat exchange chamber inside the air source heat pump through the circulating air inlet pipe and the circulating air outlet pipe. A first switching air valve is installed on the circulating air inlet pipe. The hot water storage tank is also connected to a tap water make-up point.

[0005] Furthermore: The circulating air inlet pipe is also connected to an exhaust pipe, and a second switching air valve is installed on the exhaust pipe.

[0006] Furthermore: The circulating water inlet pipe and the circulating water outlet pipe are also connected to end users. The end users are connected to the circulating water outlet pipe through an external circulating pipeline, and the external circulating pipeline is connected to the circulating water outlet pipe between the second switching water valve and the circulating water pump. A third switching water valve is installed on the external circulating pipeline. The end users are also connected to the circulating water inlet pipe through a circulating recovery pipeline, and the circulating recovery pipeline is connected to the circulating water inlet pipe between the first switching water valve and the hot water storage tank. A fourth switching water valve is installed on the circulating recovery pipeline.

[0007] Still further: A fifth switching water valve is also installed on the circulating water inlet pipe between the circulating recovery pipeline and the hot water storage tank, and a sixth switching water valve is installed on the circulating water outlet pipe between the circulating water pump and the hot water storage tank. A first diversion pipeline and a second diversion pipeline are also provided between the circulating water inlet pipe and the circulating water outlet pipe. One end of the first diversion pipeline is connected to the circulating water inlet pipe between the fifth switching water valve and the circulating recovery pipeline, and the other end of the first diversion pipeline is connected to the circulating water outlet pipe between the sixth switching water valve and the hot water storage tank. A seventh switching water valve is installed on the first diversion pipeline. One end of the second diversion pipeline is connected to the circulating water inlet pipe between the fifth switching water valve and the hot water storage tank, and the other end of the second diversion pipeline is connected to the circulating water outlet pipe between the circulating water pump and the sixth switching water valve. An eighth switching water valve is installed on the second diversion pipeline.

[0008] After adopting the above structure, the beneficial effects of the present utility model are as follows:

[0009] 1. The present utility model recovers and utilizes the useless building waste heat to produce domestic hot water, creates secondary benefits, and improves economic efficiency.

[0010] 2. The present utility model cools the waste heat accumulated at the top of the tall space inside the building, realizes the energy-saving operation of the indoor air conditioner, reduces the operating cost; reduces the waste heat emission, that is, reduces the carbon emission, is beneficial to environmental protection, and caters to the national energy-saving strategy and environmental protection policy.

[0011] 3. This design can cancel the investment in the waste heat exhaust facilities on the roof, and saves investment to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The following further describes the present utility model in detail with reference to the drawings and specific embodiments.

[0013] Figure 1 It is a structural schematic diagram of the present utility model.

[0014] In the figure: 1 is a daylighting roof, 2 is an air source heat pump, 3 is a circulating water pump, 4 is a hot water storage tank, 5 is an end user, 6 is a tap water make-up point, 7 is an upper water distributor, 8 is a lower water distributor, 9 is a first switching air valve, 10 is a second switching air valve, 11 is a first switching water valve, 12 is a second switching water valve, 13 is a third switching water valve, 14 is a fourth switching water valve, 15 is a fifth switching water valve, 16 is a sixth switching water valve, 17 is a seventh switching water valve, 18 is an eighth switching water valve. Detailed implementation mode

[0015] As Figure 1 shown, a hot water system for recovering and utilizing exhaust waste heat includes a daylighting roof, an air source heat pump and a hot water storage tank arranged on medium and large public buildings and factories with tall spaces or atria tops. The air source heat pump and the hot water storage tank are arranged on the roof on one side of the daylighting roof. The upper and lower ends of the hot water storage tank are respectively provided with an upper water distributor 7 and a lower water distributor 8 communicated with it. The upper water distributor is communicated with the circulating water inlet pipe, and the lower water distributor is communicated with the circulating water outlet pipe. A heat exchange chamber is arranged in the air source heat pump. The circulating water inlet pipe and the circulating water outlet pipe are respectively connected to both ends of a heat exchange pipeline arranged in the heat exchange chamber. A circulating water pump 3 and a second switching water valve 12 are installed on the circulating water outlet pipe, and a first switching water valve 11 is installed on the circulating water inlet pipe. On one side of the daylighting roof facing the air source heat pump, there are two joints connected to the circulating air inlet pipe and the circulating air outlet pipe. The two joints are communicated with the heat exchange chamber in the air source heat pump through the circulating air inlet pipe and the circulating air outlet pipe. A first switching air valve 9 is installed on the circulating air inlet pipe, and the hot water storage tank is also communicated with the tap water make-up point 6. The utility model recovers and utilizes the useless building waste heat to produce domestic hot water, creates secondary benefits and improves economic benefits.

[0016] As Figure 1 shown, the circulating air inlet pipe is also communicated with an exhaust pipe, and a second switching air valve 10 is installed on the exhaust pipe. In summer during the day, a large amount of waste heat accumulates on the daylighting roof 1 of the tall space roof of the building. The system uses the fan power of the air source heat pump 2 to pump the waste heat air accumulated in the daylighting roof 1 into the machine for heat exchange and cooling through the evaporator. Through temperature detection, if the outlet air temperature reaches the indoor design temperature, the first switching air valve 9 is opened and the second switching air valve 10 is closed to send the air back to the building daylighting roof 1; if the outlet air temperature is still higher than the indoor design temperature, the second switching air valve 10 is opened and the first switching air valve 9 is closed to discharge the air outdoors.

[0017] As Figure 1The shown circulating water inlet pipe and the shown circulating water outlet pipe are also connected to the end user 5. The end user is connected to the circulating water outlet pipe through a circulating external delivery pipe. The circulating external delivery pipe is connected to the circulating water outlet pipe between the second switching water valve and the circulating water pump. A third switching water valve 13 is installed on the circulating external delivery pipe. The end user is also connected to the circulating water inlet pipe through a circulating recovery pipe. The circulating recovery pipe is connected to the circulating water inlet pipe between the first switching water valve and the hot water storage tank. A fourth switching water valve 14 is installed on the circulating recovery pipe; A fifth switching water valve 15 is also installed on the circulating water inlet pipe between the circulating recovery pipe and the hot water storage tank. A sixth switching water valve 16 is installed on the circulating water outlet pipe between the circulating water pump and the hot water storage tank. A first diversion pipe and a second diversion pipe are also arranged between the circulating water inlet pipe and the circulating water outlet pipe. One end of the first diversion pipe is connected to the circulating water inlet pipe between the fifth switching water valve and the circulating recovery pipe, and the other end of the first diversion pipe is connected to the circulating water outlet pipe between the sixth switching water valve and the hot water storage tank. A seventh switching water valve 17 is installed on the first diversion pipe. One end of the second diversion pipe is connected to the circulating water inlet pipe between the fifth switching water valve and the hot water storage tank, and the other end of the second diversion pipe is connected to the circulating water outlet pipe between the circulating water pump and the sixth switching water valve. An eighth switching water valve 18 is installed on the second diversion pipe. During the exhaust waste heat recovery process, the first switching water valve 11, the second switching water valve 12, the fifth switching water valve 15, and the sixth switching water valve 16 are opened, and the third switching water valve 13, the fourth switching water valve 14, the seventh switching water valve 17, and the eighth switching water valve 18 are closed. The cold water in the hot water storage tank 4 is in the lower layer and passes through the lower layer water distributor 8, is pumped into the air source heat pump 2 by the circulating water pump 3 for temperature increase, and then is injected into the energy storage water tank through the upper layer water distributor 7, thus realizing the whole process of exhaust waste heat recovery for making hot water. During the process of using waste heat for supplying hot water, the first switching water valve 11, the second switching water valve 12, the fifth switching water valve 15, and the sixth switching water valve 16 are closed, and the third switching water valve 13, the fourth switching water valve 14, the seventh switching water valve 17, and the eighth switching water valve 18 are opened. The hot water in the hot water storage tank 4 is in the upper layer and passes through the upper layer water distributor 7, is pumped to the end user 5 by the circulating water pump 3 for circulation, and then is injected into the energy storage water tank through the lower layer water distributor 8, thus realizing the whole process of using waste heat for supplying hot water.

[0018] In summary, the utility model cools the waste heat accumulated at the top in the large space inside the building, realizes the energy-saving operation of indoor air conditioning, and reduces the operating cost; reduces the waste heat emission, that is, reduces the carbon emission, is beneficial to environmental protection, and caters to the national energy-saving strategy and environmental protection policy; and this design can cancel the investment in the waste heat exhaust facilities on the roof, saving the investment to a certain extent.

[0019] The above are only the preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions falling within the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present utility model shall be regarded as falling within the protection scope of the present utility model.

Claims

1. A hot water system for exhaust waste heat recovery and utilization, characterized in that: It includes a daylighting roof (1), an air source heat pump (2) and a hot water storage tank (4) arranged on the roof on one side of the daylighting roof. The upper and lower ends of the hot water storage tank are respectively provided with an upper layer water distributor (7) and a lower layer water distributor (8) communicated with it. The upper layer water distributor is communicated with a circulating water inlet pipe, and the lower layer water distributor is communicated with a circulating water outlet pipe. A heat exchange chamber is arranged in the air source heat pump. The circulating water inlet pipe and the circulating water outlet pipe are respectively connected to both ends of a heat exchange pipeline arranged in the heat exchange chamber. A circulating water pump (3) and a second switching water valve (12) are installed on the circulating water outlet pipe, and a first switching water valve (11) is installed on the circulating water inlet pipe. On one side of the daylighting roof facing the air source heat pump, there are two connectors connected to a circulating air inlet duct and a circulating air outlet duct. The two connectors are communicated with the heat exchange chamber in the air source heat pump through the circulating air inlet duct and the circulating air outlet duct. A first switching air valve (9) is installed on the circulating air inlet duct. The hot water storage tank is also communicated with a tap water make-up point (6).

2. The hot water system for exhaust waste heat recovery and utilization according to claim 1, wherein: The circulating air inlet duct is also communicated with an exhaust duct, and a second switching air valve (10) is installed on the exhaust duct.

3. A hot water system for exhaust waste heat recovery and utilization according to claim 1, characterized in that: The circulating water inlet pipe and the circulating water outlet pipe are also communicated with an end user (5). The end user is communicated with the circulating water outlet pipe through a circulating external delivery pipe. The circulating external delivery pipe is connected to the circulating water outlet pipe between the second switching water valve and the circulating water pump. A third switching water valve (13) is installed on the circulating external delivery pipe. The end user is also communicated with the circulating water inlet pipe through a circulating recovery pipe. The circulating recovery pipe is connected to the circulating water inlet pipe between the first switching water valve and the hot water storage tank. A fourth switching water valve (14) is installed on the circulating recovery pipe.

4. The hot water system for exhaust waste heat recovery and utilization according to claim 3, wherein: A fifth switching water valve (15) is also installed on the circulating water inlet pipe between the circulating recovery pipe and the hot water storage tank. A sixth switching water valve (16) is installed on the circulating water outlet pipe between the circulating water pump and the hot water storage tank. A first diversion pipeline and a second diversion pipeline are also arranged between the circulating water inlet pipe and the circulating water outlet pipe. One end of the first diversion pipeline is connected to the circulating water inlet pipe between the fifth switching water valve and the circulating recovery pipe, and the other end of the first diversion pipeline is connected to the circulating water outlet pipe between the sixth switching water valve and the hot water storage tank. A seventh switching water valve (17) is installed on the first diversion pipeline. One end of the second diversion pipeline is connected to the circulating water inlet pipe between the fifth switching water valve and the hot water storage tank, and the other end of the second diversion pipeline is connected to the circulating water outlet pipe between the circulating water pump and the sixth switching water valve. An eighth switching water valve (18) is installed on the second diversion pipeline.

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